Improved machine for cuttin



E, e. LAMsoN, or WINDSOR, vERMoN'r 1mm Pom: No.- 87,053, dood Fem/gy 16, 1ste.

nRQvrm 'Mcm lPOR CUTTING STONE.

Y. l i e l. meeneem mmeammtnsssmtoeunmemamnangpmofmm' To all whom it may ooncem:

Be it known that I, E. G. Larsson, of Windsor, in the county of Windsor, 'and in the State of Verm'ont,

hnve invented certain new` and useful Improvements in Stone-Cutting und Ghannelling Machine; and do hereby declare that the following is n full, clear, and exact description thereof, reference being had to the accompdnyingdrawings, and tothe letters of reference marked thereon.

The nature of my invention consists- Fnsi, in a self-tightening snmp, or holder, o non -one or more drills or chisels;

-drllls or chisels have been clamped by two clamps, one

heed-clamp add one foot-clamp, .and various methods have been resorted -to to'keepthe drills tight, but it hns invariably been found vthnt they soon become loose by use, and must be tightened anew by hand. Besld the weight, combined with' the strom and jar ou the' by two clamps, renders thcin very liable to become broken and loosened.

my selenghning lamp otviss an the dimensies. heretofore experienced in these respects, as the drills bcome tighter by use.

In order toennblc others skilledjn the nrt to which my invention' sppertcins, to mnke and. use the saine',

I will now proceed to describe its construction and oji-` erntiou, referring to the annexed drawings, which Yorin a part'of this specification, and ln which- Figure 1 is; a front view of c-drill, with self-tightening clamp, mounted on guides.

-Figure 2 is c vertical cross section of the same.

lgure 3 is n plan view, and Y Figure 4, a vertical cross-section illustrating another mode o f making the clump seIf-tighteniu -Figure 5 is a perspective of the toothed' wedge used.

to make the clamp self-tightening.

Figure 6, is n side elevation, und Figure 7, plan view of drills clamped with n selfhtening clamp, and`hov'lng a. rounddrill attached.

gures 8 and 9, und 10 and 1l, show still 'two othcr .inodes by which the clamp may be mede sc lfjtightenj rn A A represent the nidos generally used in stoue channelling machines or guiding the drills, or chisels.

B is the clamp, through which the drill or drills poss. This clamp is made in two pieces, one the main piece, a, which, by an angular piece, C, is connected to the machinery, and the other, s front or csp-piece, b.

Therexds of the moin piece c one. provided with pernotinnllyfloesI v pendlcnlnr grooves, in which the guides A A iig-so that the clamp may slidecasily up and down on' the' same. Thcfrhntslde ofthe lmain piece s has a. recess of about the ,same width and depth es the size oi the ldrillor-drills:whichynre .to be placed therein.

The cap-pice# has, on its inner side, s recess of the some width-ns the recess in the mein piece c, but itis 'tpering-in depth, being wider at the bottom than at t e top. l

The cap-piece b is, secured to the mein piece a by four bolts, c o, which pass through om rear to iront, nud huye nuts, d d, placed on their frontends..

A wedge, D, which may he made entirely of steel, or steel-line'dfond provided with teeth on its inner side,

is inserted troni below in the recess ofthe cap-piece,

the toothed side bein placed against the drill E.'

When., now, the `winxp thus constructed, which moy be puces at any point on the crm, s tightened` as far ns possible by the nuts dd, and the 'machine pnt in motion, it will be readily seen that with every blow on the stone, the drill ordrills are moved slightly upwmd, undA the teeth of the wed catohi drills, cnuse the wedge to be csrrl upward, t e drills by every blow becoming tighter and tighter, until the wedge cannot be carried any higher up, when, of course,

' the drills are immovable.

Here is the great ditference between my clamp and those heretofore constructed.

In--the old clamps, every blow has a tendency to, and oosen nuts, bolts, and drills, lbythe jm* and concnssion,.while in mine,every blow, on thereon--` trary, makes everything tighter and tighter.

, To prevent the wedge Diiom felling wherll'or any purpose, the nuts d d ere loosened,Iprovide e uppernarrower edge of the same with 'a flange, e, which projects over on top oilthc, ccppicce b, ns seen in dg. 2.

I do not confine myself to this single-method of making my clump selttightening, asit may be accomplished ln many dilcrent ways, dll clearly involving the same principle.

In the drawings, I have illustrated?, few di' the ways v bywhich this object may he accomplished, and will here enig1 briefly mention the sume.

, figs. 3 and 4, a, clamp is shown where the csp-piece itself forms the wedge.

fis the main pice ofthe clamp. t', the oop-piece, which in this case is wedge-shaped, and has no recess on' its under side, hut-is provided with teeth on that side, thessme as the wedge D,'sbove 'On the front side of the ccp-piece b', along the edges, i

nre placed wedge-shaped shoes, ff, and the bolts and nuts that fasten the clamp are placed as above described, passim,r through the shoes ffalso.

The inclined plane of the wedge-shaped ccp-piece t'4 on the may e up when oen-ieri.;`

serihed for the wedge.

lwitheorewsihomtheed 'I may piede them in the Y ofthe greatest advantage. Y

medi Y plaoed atany sharpen the ends, und it le ready to be inserted in the .Gills eta uniform width.

llsonly' ne'ssary tcrsliglitlyloosen the wlieusalfl 'The oep-,slew E' is provided-with elongated slots, h w ehthe' bolts pass, sox that the oep-piece by the drills, above de- In'iigs. 8 and 9, the wedges are opplld to the edgesof the drills,insteod of the side, in which ease the re.- oess in the cap is made wider than the drlllsfkeys are inserted between the edges of said reoess and the drills,

ofthe clamp, for the purpose of loosening the when desired.

Figs. 10 and l1 show a toothed oem-wheel, pirated4 in a slot of the cap-piece, and operating in the same mannerns'thew e. I may dispense with` the teeth on the wedge D, or eoess of the main piece of theelemp, or on both, whichever may b e considered The drill E,-as shown in g. l, is sharpened on both ends, so that when one end is worn out, it eau be and answers the same purpose as two sets of drills with the old clamps.

. Ingame of um 01d clamps, ch' head-imp amused,

and, so to say,rested on the upper edges of the drills, and it was impossible, in using the to hayehoth ends of the' drills sha. ned, but when t e selfdightening clamp, as herein, esorlhed, le used, 'the clamp may he point of the drill, and thus not interfere with its upper end.'

When more than one drill ils-used in the clamp, and one o'f them should get broken, or otherwise become shorter'than the rest, they can easily he adiueted it this clump to make their lower ends even, while in the old head-clamps, blocks had to be fitted ou the upper ends of the drills to lIneke them even at their lower ends.

Various devices have been resorted to t6 keep' the drills tight, such es notches, or corrugstions, or holes, A through which pins, have been passed, end'lnany oth- All of these involve somekind of machine-work, to be made on the drills, tpaldapt them to the holders. By using myself-tightening o1lnp,alleuoh machine; work on the drills is dispensed with as all tlxatjs ne muy is w tek-ee bar of steel, ol the @esima size,

The toothed wedges which -I use in in v clamp may, of eourse, be madeof any shape, no asto suitany kind of drills, or ehieels used, whether list, square, round,` ootufgon, or anyxother shape. l

For the purpose ot keep ug the ohannel at the proper or ny desired widthI 'pince an extra'drill, 1,- shown inv ii I6 und, 7, in addition to thelegularfehlsel or It is well known that the points gf the drills, orohsels,will graduallywear oli; 'or perhaps he broken-p; and' .thus thozehannel'will-- w' nnmer ne it dowm By now placing an sdditioueldrill, the point. of which is of the peculiar shape shown in thedrowin 'that is, spreadig,so as to be widerthanthe drill iieg in advance of the other drills, the ohannel is kept of the pointon the drilllwear oii, it

As the edges ,bination with thelguide .on clamp,

Kalthough the shape oi' the drill is immaterial.-

In addition to thetandard guides A A, whlht into' grooves ou the mail; piece of the clamp, to guide the saule, I employnged rollers, i to guide the drills.

These tollem are arranged on bars, which are secured tothe standard-guidesAA, in auch amannerastobe easily adjusted in' any direction, to accommodate the rollers to any-size drills desired to be used.

One loller is plaeed agalnst'eaeh edge of the drill, und the enges project on both frontend rear sides of the drills. A

lhe rollers is may he used et upper or lower ends ofdxills, or on both, in which letter oase' I may dispeusevwith the ide on theelam or holder.

Having thus lydesmibed my nvention,

Whst'I cleim es new, and desire to secure byLet-. tersPo.l*ent.,s- 1..A olamp, or holder, for securing one or aserles' of drills, or chisels, ln-a stone-drilling, cutting, or channelling mnehine, that is seltiglxtening, subsmntally as set forth.'

2. A wedge, either with or withoutteeth, or eorruf gatons, when used for selitightening a. clamp that is, or ehisels, substantially es.

herein set forth.

holds one or more A. slamp `when holas' che arms, er wenn, in 't stone-cutting, drilling, or channelling maehine, by ca m or wedges, as described, and continues to tighten by use,

hteni'ng Dr i substantially 'as herein set forth.

4. In combination with 'a. self-ti heidense' described, a. drill, or ellis ,sharpened at both gids, substantially and for the purpose es lrein set 5. the upperor lower ends of drills infn stonecutting, drillin gr chaqnelllngfinwhine between .adjustable flanged ro ers, to guide the drills, in oomsuhstantielly as'herei set lorth.f:

6. The adjustable drill .in estone-cutting, drilling,

'or channelling maehine, to lreep the channel the proper.

or-any desiredwidth, substantially herein set forth. 7 The combination o fth'e drill-elemp, or holder, with its drill, or drills, arrangdin'oonneetion with a. stonef` ohanuelling,eutting, ordrllng machine, between stauderd` d to operateoutsidejof the frame and track, silbsntlly ss set forth. L" j 1 8. I n oombinaionwiththedrlllsand standardggides, so arten aste allowthe laterales dirslble rollers, (fell as the horizontal adiustment ofthe drills, subemp- .tinlly as herein Aset forth.

LEOPOLD Evnn'r, A. L'Yumugn.

or holder, the whole 

